US PATENT SUBCLASS 122 / 314
.~.~.~ Central header

Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

235.11  DF  WATER TUBE {52}
305  DF  .~ Spur {8}
*  DD  .~.~ Over firebox {3}
314.~.~.~ Central header

DEFINITION

Classification: 122/314

(under subclass 305) Devices in which the spur tubes are located over the firebox on both sides of a vertical central header.

SEE OR SEARCH THIS CLASS, SUBCLASS:

319, for water tube boilers having vertical spur water tubes heated by fluid fuel.